Back roll and support therefor for looms



(No Model.) v I 2 Sheets-Sheet 1.

, L. J; KNOWLES.

BACK ROLL AND SUPPORTS THEREFOR FOR LOOMS.

' "No. 254;027. Patented Feb. 21,1882.

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(No Model.) 2 Sheets-Sheet 2.

L. KNOWLES. A BACK ROLL AND SUPPORTSTHEREFOR FOR L'OOMS. No. 254,027.

Patented Feb. 21, 1882.

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UNITED STATES PATENT OFFICE.

LUGIUS J. KNOWLES, OF WORCESTER, MASSACHUSETTS.

BACK ROLL AND SUPPORT THEREFOR FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 254,027, dated February21, 18 82.

Application filed Ju1y16,1'8E!1. (No model.)

To all whom it may concern I Be it known that I, LUOIUS J. KNowLEs, ofthe city and county of Worcester, and Commonwealth of Massachusetts,have invented certain new and useful Improvements in Back Rolls andSupports therefor for Looms; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being badto the accompanying drawings, forming a part of this specification, andin which Figure 1 represents the side of a loom-frame, showing theback-roll stands and back roll hereinafter described arranged andsecured upon the same. Fig. 2 represents a horizontal section throughthe. arch-stand of the loom, taken on line A B, Fig. '1, looking in thedirection of arrow in same figure, showing a plan view of one of theback-roll stands and per tions of the back roll, crank-shaft, crank, andcrank-arm. Fig. 3 represents upon an enlarged scale a top or plan viewof a portion of one of the back-roll stands, with one end of a section'of the back roll secured to the same; and Fig. 4 represents upon a stilllarger scale a central longitudinal section through the back roll androll-stand shown in Fig. 3, taken on a continuation of line A 13therein, looking in the direction indicated by arrow 0, same figure, thetie-rod and its nut and washer being shown in side elevation.

My invention relates to back rolls and their supporting-stands employedupon looms for supporting and guiding the warp from the yarn-beam to theheddles of the harnesses-in the operation of weaving.

It consists in the construction and arrangement of the several partswhich compose said roll, and in the combination of said roll, itssupporting-stands, and the loom-frame, as will be hereinafter more fullyset forth.

To enable those skilled in the art to which my invention appertains tomake and use the same, I will proceed to describe it more in detail.

In the drawings, the parts marked D represent the back-roll stands, uponwhich the back roll, E, is supported. Said roll stands or supports arebolted at one end to the loom-sides a and at their other ends to thearch-stands b hollow cylinder or tube, E,which may be made of anysuitable metal. Each end of said cylinder E is provided with a metalhead, F,having a rim, G, formed upon its outer edge for hearing againstthe end of the cylinder when it is inserted or driven into the endthereof, as is fully represented in Fig. 4 of the drawings. Through thecenters of said heads are formed longitudinal openings for the passageof a tierod, H, said openings being in this instance made to fit thesurface of the tie-rod only for a short distance from the outer ends ofthe heads, and then flaring or cone-shaped, as represented in Fig. 4,thereby enabling the tierod to be easily passed through from one end ofthe roll to the other after the heads F have been fitted into the ends.4 It is obvious that if the openings in the head were not made flaring,as aforesaid, the operation of passing the rod through would be quitedifficult. It also serves to lighten the weight of the roll. The backroll is fitted between the surfaces 0 of the roll-stands D, being inpractice about seven feet in length. It is secured to said stands bypassing the tie-rod through the roll and through horizontal slots (1formed in the stands, and then fastening the parts together by means ofnuts 0 upon each end of the tie-rod, which may be turned up against theouter sides of the stands D. Washers may also be used between the sidesof stands D and nuts 0, if desired. Slots d extend from the points f tothe points 9 in the roll-stands, as is represented by dotted lines inFig. 3, thus allowingof the adjustment forward or back of the roll uponsaid stands.

The stands D may be recessed to receive the nuts 0 of tie-rod H, asrepresented by full lines h in Fig. 4, and dotted lines in Fig. 3; orsaid stands may be made solid, with simply the slots (1, beforedescribed, formed in the same.

It has recently been found desirable in weaving different kinds of clothto arrange the back of the loom. The back roll, E, consistsof a I roll,E, nearer to the harnesses of the loom 5 traversed by the cranks J ofthe loom. Said stands are so formed (see Figs. 1 and 2) as to allow thecranks J to turn without striking them,while at the same time they forma firm and rigid support for the roll E.

It will be seen that when the stands 1) are bolted to the loom-frame andthe roll E secured to said stands, as before described, said roll is notonly held in the desired position, but a strong and substantial girt isprovided for that part of the loom-frame, which tends to greatlystifl'en it. This alone is of considerable importance, especially inweaving heavy goods, by preventing the shaking of the loom to aconsiderable extent when the latter is in operation.

Having described my improvements in back rolls and supports therefor forlooms, what I claim therein as new and of my invention, and

20 desire to secure by Letters Patent, is-

with beads F F, and tie-rod H,back-rol1 stands or supports D D, and theloom-sides a and arch-stands b of the frame of a loom, constructed andarranged substantially as shown and described, for the purpose stated.

LUCIUS J. KNOWLES.

Witnesses:

H. H. MERRIAM, ALBERT A. BARKER.

